Numerical particle-scale study of swelling pressure in clays
David W Smith, Guillermo A Narsilio, Peter Pivonka
KSCE JOURNAL OF CIVIL ENGINEERING | KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE | Published : 2009
The particle level responses to different external loadings of a montmorillonitic clay soil are investigated numerically. The soil is saturated by a solution of monovalent counterions, of varying concentrations. We use finite element micromechanical models (based on the Poisson-Nernst-Planck equations) to estimate counterion and electrical potential distributions around individual clay particles at various distances from one another, since analytical solutions are not possible for these complex arrangements of particles. Disjoining pressures are then estimated using the Van't Hoff relation and Maxwell stress tensor. As the distance between the clay particles decreases and double-layers overl..View full abstract
Awarded by Australian Research Council's
The authors acknowledge the Australian Research Council's support for this work under the Discovery Grant Project No. DP 0451576.